Ground scraper and leveler



Nov. 25, 1930.

J. T. COMPTON GROUND scRAPEn ANDI LEVELER original Filed April 25, 19286 .Sheets-Sheet 1 NM. QN.

n fp i. nu z I5.

Nov.v 25, 1930. J. r. coMPToN GROUND SCRAl-ER AND LEVELER origipl FiledApril 25, 192s 6 Sheets-'Sheet 2 v gi,

IIN/@n far.: Jal/195 Z fam/v fon Nov. 25, 1930. -J. r. coMPToN GRGUNDlSCRAPER AND LEVELER Original Filed April 25,- 1928 6 Sheets-Sheet 3lnvenar. Jal/ls (bm/fan Nov. 25, 1930.4 J. T. COMPTON I GROUND SGRAPERAND, LEVLBR I original Filed April' 25, 192e e sngetsneet 4 @was .ZTfam/Pfau.'

Nv.25,1930. 4 J. T. @MF1-0N 1,182.66

Gnouun scRArER Ann mammal! 4 original Filed April 2s. 192e ssheets-Sheet 5 In verd-o2' Jaklps .7. foin' fon B5/ Nov. 25, 1930: A J.T. COMPTON 1,782,546

y GROUND scnAPER AND LEVELER v Original Filed April 25, 1928 6Sheets-Shed, -6

Patented Nov. 25, 1930 j Jenner'. coiurrolt,on'LosANGELES,oALIroaNiAf2Q;j

Gnonrrnscnaran Ann ALjnvan:unV

Appiiycationmedapm25, was, semi No. 272,741. Renewed augut'4, 1930.

This invention relateslto ,a ground scrap-r ing and leveling machineofthe shovel type,

and has as itsyprimaryobject the provisionl of an implement Whichisoperable Whilebel ing' advancedover .the kgrou-ndesurface toV j scrapeandremo've the surface material, to

i collect and` convey the removedmaterials,

to dump the accumulated loadof materials, to effect a leveling action,and to be restored l@ to a normal postiony j l Another-object istoprovidea' mechanism;

of the'aboye `characteroin which theseveral" Operations may be manuallycontrolled by anloperator located at a remotejaoint in ad- Vance of theimplement whereby it-fis adapt` ed to betowed over the ground surface`by means of a motor yehicle, such as a tractor,- and bezcontroll'edentirely by an operator on the vehicle.-

of its contents, `together with means for` supporting and maintainingthe scraper in its tiltedposition sothat` itvvill then serve as a.leveler, and embodying means for adjustingthe extent of tilt of thescraper to` varions positions. p p Y j Another obj ectis to provide aconstruction and arrangement ofthe controlling mechanism such thatobstructions on the ground thereof. 'j

Another (object is to provide the scraper with a control mechanismwhereby it may picked Aup and deposited Where desired.

Another Objectis tozprovide `a manually lcontrolled means operable bytractional engagementvvith the ground surface during ad vance of the`implement thereoverafor automaticallyrestoring therftilted scraper toits f positions. i

i gether -With such other objects` `andladvan-` Another object is toprovide a meansvvhere- ,i

tion of the cutting edge ofthe scraper `may be automatically. tilted toeffect discharge surface can not cause accidental operationV beoperatedvvith great accuracyand the loads normal position wherebythetrip; controlled mechanism above referredto will be reset inreadiness for another operation-` j Another object is to provide theimplement with a draftfappliance whereby thepull ap?` plied to thescraper in eifectingits advance Will be imparted thereto bothtotheupperk Yand lower portions thereofrwhile the scraper isV inkeither itsloading, dumping or leveling j VA furtherobject is to-provide .i animplef` ment ofthe above character which istespecial-j` ly applicablefor use inA heavy duty service,N

whereby the Working 0f` extensive lsurface areas and the handling ofcomparatively large speedily and economically effected." i 4 jTllViththe foregoing objectsin vievvptotages as may subsequently appear,the inven- Y tion resides in the features, and in-the[parts` VVandcombination, construction andarrangement of parts hereinafter describedand,

claimed7 and illustrated `bywvvay of example in theaccompanyingdrawings, in which: l

Fig. l is a vievv of the implementjas seen in side elevation showingitin its normal' posil Fig. 2 is ai detailin j section takenonffthe line2-2 ofFig,` l, showingwtheftrunnion- 5D` construction; i

Fig. 3 `isa detail in section taken on the line 3-3 ofuFigl; Y i i jFig. 4: 4is af View inside elevation of the scraper body `Withpartsremoved, showingV the manner of adjusting thefrunners in regu-` latingthe eXtcntof lift of thescraper body in the dumpinnr operation; i fs tFig. 5 is aplan vieWo the implement with theV parts disposed as showninFig. l; j j

Fig. `6 is fa'detail in section and 'elevation i taken .onifthe linen(iQ-6 of 5; l

4 Fig. 7' is a detail in section `and elevation as seen on therline 7-7ofFig".` 5 in the direcg5 tionindicated bythe arrovvs; j H p FigSis adetailin horizontal section tak-fV en on the line A`8.--8 of Fig. V7

Fig. 9isl a detail inmsection as vievvedon the line9--9 of iwithpartsremoved` No es `quantities of materials Will be facilitated, 4andshowing the implement as disposed in its surface scraping and loadingposition;

Fig. 10 is a detail in side elevation illustrating the construction andoperation of the mechanism for controlling the scraping and loadingoperations;

Fig. 11 is a view in section as seen on the line 11-11 of Fig. 10;

Fig. 12 is a view in section takenon the line 12-12 of Fig. 10;

Fig. 13 is a view of the implement as seen in side elevation showing itwith the parts as disposed in the dumping and leveling position;

` Fig. 14 is a view in section taken on the line 14-14 of Fig. 13;

Fig. 15 is a View in section as seen on the line 15-15 of Fig. 13;

Fig. 16 is a horizontal section and plan view as seen on the line 1616of Fig. 13;

Fig. 17 is a detail in section as seen on the line 17-17 of Fig. 13;

Fig. 18 is a perspective view of the implement showing the scraper inthe leveling position with the parts as initially disposedvin effectingautomatic restoration of the im"- pleinent to the normal position;

Fig. 19 is a detail in side elevationV with portions removed andillustrating the restoring mechanism and the mode of operation thereof;

Fig. 2O is a detail in perspective of a portion of the control mechanismgoverning the restoration of the scraper body to its normal position;

Fig. 21 is a perspective view of the implement as seen from the frontthereof, showing it as disposed in its normal position;l

Figs. 22, 23, and 24 are diagrammatic views showing the operation of therestoring mechanism.

Referring to the drawings more specifically, A indicates generally thescraper body which comprises a bottom wall 20, a back wall 21 formed incontinuation ofthe bottom wall 20, end walls 22 and 23, a gusset plate24 intermediate the end walls extending between the bottom and backwalls, and a scraper blade 25 extending along the f orward edge of thebottom wall. Projecting forwardly and upwardly from the upper edge ofthe back wall 21 is a bracket 26 having a downturned rear end portion 27abutting against the rear face of the back wall 21 and lixedly securedto the latter. This bracket constitutes an element of a draft applianceincluding a tongue B, and affords a connection between the tongue andthe rear upper portion of the scraper body intermediate the endsthereof. The forward end of the bracket 26 is pivotally connected by apivot pin 28 to a pair of parallel links 29 an'd 30 which projectforwardly on opposite sides of the tongue and constitute side members ofa carriage C slidably supported and guided on the tongue B. The forwardend of the tongue is fitted with an eyelet 31 for connection with avehicle or other means for drawing the implement. The tongue embodies apair of vertically spaced parallel bars 32 and 33 connected together attheir ends; a space .a being formed between the bars to constitute aguideway.

The carriage C embodies a pair of rollers and c as shown in Figs. 11 and12, which are supported on the links 29 and 30 in spaced relation toeach other and project into the space a between the bars 32 and 33; therollers embodying sleeves turnably mounted on stub shafts Z havingreduced threaded end portions c which project through the links and areengaged by nuts f. The reduced end portions of the stuh shaft carryingthe roller b pivotally connect with a yoke 34 which extends astride andprojects above the tongue B and is rigidly and adjustably secured to anarm 37 by means of a pair of bolts 38 engaging certain of a series ofholes 39 in the arm. The arm 37 projects substantially parallel with thetop bar 32 of the tongue and its forward end is pivotally connected by apivot pin 40 with an operating lever 41, one end of which is pivoted at42 to ears g on the tongue B and the other end portion of which projectshori- Zontally and then upwardly and is connected with a forwardlyleading pull cord 43. The lever 41 and its connections with the scraperbody through the arm 37 and carriage C serves as a means for enablingmanual rocking of the scraper from its normal position to its scrapingposition and to regulate the extent of penetration of the scraper bladein the surface materials being Worked, as will be later described.

The pivotal connection 40 of the arm 37 with the lever 41 is locatedbetween the pivotal mounting 42 of the lever 41 and the connectionbetween the outer end of the arm and the carriage C so that this arm andthe portion oi," the lever extending between the pivots 40 and 42 servea toggle, which when the parts are disposed in the normal position asindicated in dotted lines in Fig. 12 will sei-veto lock the upper rearportion of the scraper body against forward movement relatively to thescraper edge portion thereof under the urge of forces directedrearwardly against the cutting edge of the scraper. The lever 41 inbeing formed with the horizontal portion projecting rearwardly above thearm 37 will normally gravitate to this normal locking position andaccordingly will automatically return to normal after having been rockedupwardly and forwardly on release of the pull thereon. As a means forlimiting the forward rocking movement of the lever 41, the lower endthereof is formed with a projection It as shown in Fig.

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10, which is adapted to strike a. wall iconnecting the ears g, andthereby servelastop.

Mounted for movement longitudinally ofv the tongue B is a carriage Dembodying side plates 44 and 45 extendingv on opposite sides of thetongue and includinga pair Vof rollers 46 and 47 revolubly supportedonthe plates and extending between the members 32 and 33 of the tonguewhereby the carriage is supported and guided on the tongue.` The rollers"46 and 47 each consist ofa sleeve j revolubly mounted on a stub shafthaving reduced threaded` end portions `Z which project through theplates 44 and45 and are engaged by nuts m. i i

Projecting downwardly from one end of the carriage D is a yoke `4E5`towhich is pivotally attached at 49,1 a drawbar 50 which extendsrearwardly and connects with the forward bottom portion of thescraperintermediate the :endsof thelatter; the draw bar being here shownVas pivoted at 51 to the gusset plate 24. `The draw vbar 50 thus affordsa connection between thecentral for- Ward portion of the scraper and thecarriage D. Extending downwardly and diagonally i tween the plates 44and45 beneath thetongueV member 33 as shown in Fig. 14.` Nuts screwed onthepins 0 serve to hold the loops a in placeon the pins on the plate.

As a means Vfor. holding 'the carriage D in its `forwardmost position onthe tongue B,

a pa-wl or hook 5,5 is pivoted at `56.011 the carriage D and arranged toproject 'forwardly thereof above the tongue,`and the forward end portionof the tongue is provided with a keeper 57 with which the Apawl 55 isen- Y gageable; The keeper `57 embodies ahardf. cned steel sleeve 1"extending transversely across the upper member 32 ofjthe tongue andrevolubly carried on a ibolt s supported l on `side plates t and u-fixedly attached to the forward end portionof the tongue as shown f inthe Figs. ,1 6 and 171 When thecarriage D is disposed inV itsforwardmost position,

. the'scraper body A will be'disposed-inits normal position as shown inFig., -1,that is with the forward portion of the 'bottom wall ofthescraper inclined; upwardly to elevate the `scraper iblade 25. Al/Vhentheicarriage C is advanced as Abefore described, 4vthe scraper body willpivot on its connectionswiththe draw bars.` v

.fI-heipawlz` 55 iis disengaged from'. the keeper" scraperbody while theimplement is advancing, so as to permit the carriage D to moverearwardly on Vthe tongueand allow the scraper bodyto swingrearwardlyand upwardly. `For this purpose, an" upstanding bell-crank lever 58 ispivoted at59 on theupperforwardend portion of the .tongue and isformedon itsshort arm with afinger 60 arranged to project beneath'theouter end portion of they pawl 55 `in such manner that on rocking the:upper end portion of the lever 58 forwardly, the linger 60 will raise,the pawl 55 out of engagement fwith the` keeper 5.7.

rEhe upper end of the lever58 connects with` `.i i

a'forwardly leading pull cord 61. A spring 62 connectedto the lever 58acts `to normally maintain the latter in a retracted` position.V

As a means-for limitin forward movement .v

ofthe-@lever 58, thelower end portion thereof i y is provided with aprojection 63 adaptedto; strike the `tongue B when Vthe lever 58 hasbeen advanced suiiiciently to disengage `the pawl 55 g. and as aimeans`for limitingupward movement of the pawl,' the :latter vis fitted with arearward extension 64 arranged to strike the upper. face of the tonguewhen the: pawl is swung upward sufficiently to .clear the leeper57.- Thebars 32 and 33 of the tongue are `formed with aligned openings 65,

to receive -a ypin M66 to aiford an abutment which wrilll serve asameans forilimiting `rear-V ward movement of the `carriage D `and fordeternnning .the extent .of tilting :of: :the

scraperbody. l i

. As ameans :for affordingia substantial support for the scraper body,when the latter is tilted, a pairof runners `or .shoes 6.7 andf68 arelmounted to., extend longitudinally `in front lof the forward edges ofthe side walls 22 and 23; the runners embodying plates which projectIbeyond ,the upper ends lof the walls 22 and 23 `andare slightly curvedat their" outer end lportions. The runners `are securedin place by meansof brackets@ and adapted Ato 4be `adjusted at `'various positions tovary `the longitudinal inclination of the runners relatively fto thefront endsof the scraperendlwalls `and also to space ithe runners,` atvarious vpositions relativelyto the front edges of the scraper end wallsaccordles ing Vto the extent of elevation of the scraper i desired.formed with a series of spaced openings c for engagement by a bolt w Lonthe scraper bya boltwith anyone of a seriesof openings y formed in barsa carried bythe scraper end walls and projecting above and substantiallyparallel with the upper edges of theilatter as s3 particularly shown inFig. 4. i

lFor this purpose the bracket 70 is ifm i end wall and the upper bracket69 is engaged Projecting outwardly from the upperjjaortions ofthe endwalls 22 and `23 are trunnions which embodies a hub 73 supported on thetrunnion to which hub and angle-iron bar 74 is ai'iixed intermediate itsends, and also in chicles a semi-circular rim 75, the ends of which areailixed to the terminals of the bar 74; spokes 76 affording a furtherconnection between the rim and the bar.

The haliwheels E and F are normally held against rotation and for thispurpose, a pin 7 7 projecting inwardly from the bar 74 on eachhalf-wheel is engaged by a hook 78 formed on the forward end of a stem79 pivotallysupported at its rear end by a pin 80 on a crank arni 8laffixed to a. rock shaft 82 as shown in Fig. 20. The hook 7S opensdownwardly and is elongated so as to permit -the pin 77 to freely ridein and out of engage`- ment therewith; the hook being norn'nillydisposed in position to e'liiect engagement with the pin and remain insuch engagement until its release is effected by means of a spring 83arranged to exert a downward pull on the hook; the spring engaging a rod8i extending parallel with and connected to the stem 7 9. As a means forlimiting downward movement of the hook under the urge ot' the spring 83,the rod 84C is extended through an elongated loop 85 projecting upwardlyfrom the end wall of the scraper body; which loop also serves as a guidefor movement oi the hook and stem. The half-wheels E and F are normallydisposed with their peripheral portions extending rearwardly as shown inFig. l and 2l, and are maintained in this position while the scraperbody is disposed in its normal. position, and its scraping and loading'position, and being projected upwardly when the scraper is in thedumping position; the half-wheels being turned to present the upperforward end portions thereof to the ground when it is desired to eliiectrestoration of the scraper body to its normal position from its tilteddumping and leveling position. This operation is effected by rocking therock shaft S2 as will present,- ly be described. The rock shait 82extends longitudinally above the scraper body and is supportedintermediate its ends in a bearing 86 on the bracket 26, and at its endsin bearings 87 and 88 carried on the bars e projecting above the endwalls 29. and Q3.

.friixed to the rock shaft is an arm ffl?) which normally projectsrearwardly over and beyond the back wall of the scraper body, to theonter end of which is pivotally connecte l at 90, a pair ot links @lleading "lorward and pivot-.illy connected at their forwa rd ends at 92to an operating lever 93. The toi-ward end of the lever 93 is pivot-ed a.()lto a standard 95 erected from the gusset plate 2d and aixed to thebracket 2G; the lever 93 projecting rearn-ardly and having its outer endconnected with a forwardly leading pull cord 9S. A- spring 97 extendsbetween the rear wall of the scraper body and the arm 89 and normallymaintains the latter in itslowermost position in whichposition the rockshaft is disposed with the crank arm 8l inclined rea" wardly so that thehooks 7S will then be retracted as shown in Fie. l.

The arm 89, links 9i, and lever 93 consti tute a toggle which, whenfolded under the urge ot a spring Q7 securely locks the scraper body inits normal position against turning on its pivotal connection with thedraw bars while the carriage D is held in its advanced position, andalso serves to hold the upper portion of the scraper body againstrocking forward from the hunpinjr and levelposition (shown in Fig. .l-)under the pull imparted thereon through the tongue. l'his iunctionattained by reason on" the pivotal connection between the links Sil andthe lever normally extending in alignment with the pivotal mounting ofthe lever and the con4 nection olf the links to the arm Si).

As a means ior bracing upper margin ci the rear wall oi the scraperbody, and preti' g its bending inwardly under the pnll d through thetongue to the intermeni 'ion thereof, a truss rod Q8 is securef. it.ends to the scraper end-walls adjacent their intersection with the upperend portion ot the back wall and is engaged intermediate its endsv-.iith a bracket 99 projecting4 eriorly oi' the scraper from the innerface oi' the back wall adjacent the upper margins of the latter as shownin S). [is a, means for strengthening the tongue l, the latcr is fittedwith a truss rod 100 extending longitudinally on the under side thereof;the 'truss rod being ailixed at its ends on the end portions of thetongue and extending over spacers lOl and 102 seating on the lower bar232) ot the tongue. i

ln the operation of 'the invcnnion, when the implement lis disposed withthe parts arranged as shown in Fig. l and being ad vanced, and with thebottom of the scraper body inclined upwardly, in which position itmaintained by the pawl 55 engaging the keeper on the tongue l, thescraper vwill slide on the rear portion oi its bottoni wall. To minimizei'riction and wea r.v the und:` side oit' the bottoni wall olf thescraper is provided with reentorcin runner plates 10S- as is con mon indevices of this character. When the parts are thus positioned, theimplement may be employed in scooping, Cumipingl and lei/eling the soilwithout initially employing the scraping feature, but when it is desiredto canse the scraper blade to eli'ect a scraping action, the operatinglever 4l is rocked upwardly and forwardly, as by exerting` a pull on thecord- 43, whereupon the forward edge of the scraper blade is tilteddownwardly as before described, and as shown in full lines in Fig. 10.

On advance of the scraper, materials passing over the scraper blade willbe collected lill "in the scraper body and will be conveyed forwardtherewith. When it is desired to dump the contents of the scraper and tolevel thedeposited materials, the bell-crank lever 5 `disirockedforwardly, as. by exerting apull on the cord 6l, whereupon the pawlf`55will be tripped to release the carriage Das beforeldescribed, which willrelieve the pull on the draw bars 50, 52' and 53 so that thev pull onthe scraper `will be imparted thereto solely through the tongue B, andby virtue "of this `pulling` action being appliedv to the i upperportion of the scraper'bod'y through ithelbraclret 26, the upperportionof the scraper will.l advance relatively to its lower portion and thescraper will roclrforwardly until the runners 67 and 68 are presented toand supported upon the `groundsurface as shown in Fig. 13./ In thisoperation, the

` .o lower forward portion of the scraper mo1nentarily comes to rest,which causes the tongue Bto"A advance relativelyto the .carriage D untilthe abutment pin 66 is brought against the carriage, whereuponcontinuedforward 5 movement of the'tongue will advance thecarriage therewith withthe carriage in its retracted position. The scraper will then ad- `Vanceon `therunners 67 and 68 by pulls applied to the upper edge thereofthrough the 0 tongue B, land to the lower portion thereof `through thedraw bars50, 52 and 53. As

before stated, `the' extent ,ofI tilting of the scraper in thisoperation .isgoverned bythe position of the abutment pin 66, and whichis varied as occasion may require according to the character ofthe soilbeing worked and the rapidity of `discharge of the load desiredr{Itlwill be understood that the pulling action oftheitongue- B on theupper portion of the i scraper will i be directed thereto throughthe bar37, carriage C and links 30.

Then the scrapervis thus positioned, the

s scraper blade will be spaced above the sup- -porting runners 67and 68so that the dumped materials maypass beneath the scraper blade.

' As before stated, the'height of the scraper blade relatively to the4ground y when the scraper body is thus. disposed may be regulated asoccasionemay require by adjusting the o runners 67 and 68 asindicatedgin 4. YVherethe deposited load of materialsis such `asI toextend above the plane of the then downturned edge of the scraper blade,the latter will effect a leveling action.

.5 Whenit is desired "to restore' the scraper Y toits normal position,the operatinglever 93,

which @then extends upwardly fas' shown in Fig. 13 and full linesinfFig.19is swung forwardly, asby exerting a-pullon the cord 19, whichoperation frotatesthe rock i shaft 82 Vand causes the crank arms 81 toadvance andthereby -move the hooks`78 forwardlyso as to `permit thehalf-Wheels to 5*turn by gravityfrom the position shown in 196, askshownin, Fig. 18. andin dotted linesiny full lines in Figqlqv to `thepositionshown in dotted lines.

The ends of the wheel rims Y thenpresentedto the ground `being formed`toi constitute spurs 104,' will effect engage- `ment withthe ground andaccordingly as the scraper advances, the halfwheels will be J caused toturn on the trunnions into the poxsition shown in Fig; 22, and by reasonof the radiusgof the half-wheels being of a greater 4length then theVdistance -between the axis of the trunnions and the supporting faces ofthe runners`67A and 68, the scraper `will be initially elevated, `asshown in Fig. 22`,to lift o'r merel-y above a deposited load, as wherenof leveling action is required, and-in `which latter event, the restoringoperation' is or may be effected immediately after the` dumpingoperation. i i

VBecause .ofi the `peripherial length of` the rims of;thefhalf-wheelscontinuedtnrning off the half-wheels from@ the `positionshownfin F ig. 22 to the position shown in `lligJQB,`

leo

that is one-fourth of a revolution, the wheels will exert a ppllA onthescraper body through the trunnions such` as to rock the scraper bodydownwardly and` forwardly on `its pivotal connection with the rear endAof the so doing, the forward portion of the scraper will be `advancedat a faster rate oftr'avel than that ofthe advancingtongue so ast'ocause the carriage D to move forwardly on the tongue.` This advance ofthe carriage D isrcontinued during the travel of the wheel rims on theground and until they whe'elsturn from the ositionshown in Fig. 24 tothat tongue andthereby restore the scraper to its normal yetslightlyelevated` position andin` shown in ig 1, Awhereupon the;carriage D will be advanced sufficiently to causelthe pawl or hook 55toreengage the keeper 57. i When `the `half-wheels `are' turned'so thatthe lower ends thereof pass rearward of the axis of the trunni-ons, thescraper body will be lows Y ered to its seated position on the ground. i,"During this restoring operation,` on release of the pull: on` theoperating lieverA 93,

the spring `97 will'restore thisA lever `and `its connections tonormal,- and aslthepscraper body swings to normal, the *hooks 78'wi-llbe positioned to. elfectreengagelnent withlfthe pins 77 i onthehalf-wheels. This action is auginentedby thelever 93 gravtatingto norymal on disposing the scraper body in its normal position.

It will be observed that when the scraper body is in its scraping orloading position, the lever 93 will project rearwardly and downwardly insuch manner as to render its operation diiiicult if not impossible by apull on its operating cord, which minimizes any possibility of thehalf-wheels being inadvertently released while the scraper is in itsscraping or loading` position.

V'Vhile I have shown and described a s pccitic embodiment of myinvention, I do not limit myself to the exact details of constructionand arrangement shown, but may employ such changes and modications asoccasion may require without departing from the spirit of the inventionas defined in and coming within the scope of the appended claims.

I claim:

l. In a ground working mechanism of the vcharacter described, ascraperbody, a tongue,

a connection between the tongue and the upper portion of the scraperbody, a carriage slidable longitudinally of the tongue, connectionsbetween said carriage and the lower forward portion of the scraper-body,trip controlled means for releasably holding the carriage in an advancedposition on the tongue, means for limiting retractive move ment of thecarriage, and means on said scraper body engageable with the ground forautomatically eifecting advance of said carriage from its retracted toits advanced position.

2. In a ground working mechanism of the character described, a scraperbody, a tongue, a connection between the tongue and the upper portion ofthe scraper body, on which said scraper body is pivoted to swing from a.normal to a dumping position and vice versa, a carriage slidablelongitudinally of the tongue, connections between said carriage and thelower forward portion of the scraper body, trip controlled means forreleasably holding` the carriage in an advanced position on the tongue,operable through said connections to hold the scraper body in its normalposition, means for limiting' retractive movement of the carriage,operable to determine the dumping position of tbe scraper body, andmeans on said scraper body engageable with the ground for automaticallyeffecting advance of said carriage from its retracted to its advancedposition, to effect restoring of thescrapcr body from its dumping` toits normal position.

3. In a ground working mechanism of the character described, a scraperbody, a tongue, a connection between the tongue and the upper portion ofthe scraper body, on which said scraper body is pivoted to swing from anormal to a dumping position and vice versa, a carriage slidablelongitudinally of the tongue,` connections between said carriage and thelower forward portion of the scraper body, trip controlled means forreleasably holding the carriage in an advanced position on the tongue,operable through said connections to hold the scraper body in its normalposition, means for limiting retractive movement of the carriage,operable to determine the dumping` position of the scraper body, meanson said scraper body engagcable with the ground for automaticallyctl'ecting advance of said carriage from its retracted to its advancedposition, to ciicct restoring of the scraper body from its dum ping toits normal position, and means carried by said scraper body forcontrolling operation of said la st named means.

4. In a ground working machine of the character described, a tiltablescraper body, a tongue, connections between the 'tongue and the upperportion of the scraper body affording'a pivotal connection, connectionsbetween the lower portion of said scraper body and said tongue forholding thel scraper body in an urn-ight position adapted to be operatedto permit tilting of the scraper body, and means carried by the scraperbody engageable with the ground and operable under the urge of a pullimparted to the scraper body through said tongue to restore the scraperbody to an upright position from a tilted position during advancethereof.

5. In a ground working machine of the character described, a tiltablescraper body, a tongue, connections between the tongue and the upperportion of the scraper body affording a pivotal connection, connectionsbetween the lower portion of said scraper body and said tongue forholding the scraper body in an uprightposition adapted to be operated topermit tilting of the scraper body, means carried by the scraper bodyengageable with the ground and operable under the urge of a pullimparted to the scraper body through said tongue to restore the scraperbody to an upright position from a tilted position during advancethereof, and manually operable means controlling said last named means.

6. In a ground working machine of the character described, a tiltablescraper bo( y, a tongue, connections between the tongue and the upperportion of the scraper body a iiording a pivotal connection, cmlncctionsbetween ythe lower portion of said sera per body and said tongue forholding the scraper bodjv in an upright position adapted to beo}j)erated to permit tilting of the scraper body. a pair of segmentalwheels pivotally carried on the lends of said scraper body, means fornormally holding said wheels with the arcuate tread portion thereof outof engagement with the ground operable to release said wheels to permitthe forward end portions thereof to gravitate into contact with theground when the scraper body is in a tilted position; said wheels beingoperable on rotating with their llt) lio

tread portions traversing the ground torestore the scraper body from atilted to an upsV right. position. Y 7. Ina ground worling'machine ofthe character described, a tiltable scraper body,

a tongue, connections between the tonguel and the upper portion of thescraper body aifording a pivotalconnection,connections between the lowerportion of said scraper body and said tongue for holding the scraperbody in an upright position adapted to be operated to permit tilting ofthe scraper body, a A pair of segmental wheels pivotally carried on theends of said scraper body, means for normallyliolding said wheels withthe arcuate tread portionthereof out of engagementl with the groundoperable Vto release said wheels to permit the forward end portionsthereof to gravitate .into Contact `with the ground when the scraperbody is in a tilted position; said wheels being operable on rotatingwith their tread portions traversing the ground to restore the scraperbody from a tilted to an upright position, and manually operable meansfor controlling the release of said wheels. i

8. In a ground working macliineof the character described, a tiltablescraper body, a tongue, connections between the tongue and the upperportion of thescraper body af fording a pivotal connection, connectionsbe tweenthe lower portion of said scraper body` and said tongue forholding the scraper body in an upiight position adapted to be oper-Yated to permit tilting of the scraper body, a

Y pair of segmental wheels revolubly mounted on the ends of saidscraperibody, a rock shaft carried by `the scraper body, meanscontrolled by said rock shaft for `normally holding said wheels againstrotation with the tread portions thereof clear of the ground,

i, and a manually operable toggle for actuatotal connection, a carriagemovablelongitudinally of said tongue, connections between lsaid carriageand the lower forward portionv i of said scraper body, aV pawl`aliording a connection between said tongue and carriage to hold thelatter in a forwardinost position and thereby maintainsaid scraper. bodyin an upright position, manually controlled `ineans operable throughythe connection through the tongue andthe upper portion of the scraperbody to tilt the scraper body `While inits upright positionlt-o landfrom `a independent of said last named means to dis-V engage said pawlwhereby said scraper body` will rock to a tilted dumping position underthe urge of a pull imparted through said tongue, said carriage beingmovable longi-` tudinally of said tongue on movement of the vscraperbody to its tilted dumping position, and means for limiting retractedmovement vof said carriage adjustable toyvary the ex# tent of tilt ofthe scraper body inits dumping position, and manually controlled meansengageable with the ground to effect advance of` said carriage on saidtongue under apull. imparted to said scraper body through` said` tonguewhereby said scraper body will be..

restored from a tilted to an upright position during advance thereof. ii f l0. In a ground working machine ofthe `character described, ascraperbody, a tongue,

connectionsl between the tongue and the upper end of the scraperbodyaffording a pivotal connection, a carriage movablelongitu dinally ofsaid tongue, connections between said carriage and the lower forwardportion of said scraper body, a pawl aii'ording a connection betweensaid tongue and carriage to hold the latter in a forwardmost positionand thereby maintain said scraper body in an upright position, manuallycontrolled means .operable through the connection through the tongue andthe upper portion of the j scraper body t-o tilt the scraper body whilein its upright position to and from a scraping position, manuallyactuated means inde- `pendent of said last named means to disengage saidpawl whereby said scraper body will rock to a tilted dumping positionunder the urge of a pull imparted through said tongue, said carriagebeing movable longi-VV tudinally of said tongue on movement of thescraper body to its tilted dumping position, means for limitingretracted movement of ice said carriage adjustable to vary the extent of`tilt of the scraperbody in its dumping position, manually controlledmeans engage# able with the ground to effect advance of said carriage onsaid tongue under a p ulluiinparted t0 said scraper body through said`tongue whereby said scraper body will be restored from a tilted toanyupright position during advance thereof, runners on said scraper bodyfor supporting the latter on `the ground in its tilted dumping position,andv means for adjustably carrying said runners on, said scraper body,whereby the scraper A i body may be disposed in various spaced relationsto the ground when supported on said runners.'

In testimony whereof, have affixed my i signature.

JiiMns T. coMr'roii.

' scraping position, manually actuated'means iioY

